Gain access to thousands of additional definitions and advanced search features—ad free! JOIN NOW
: either of two acidic compounds C10H6N4O2 containing a pyrimidine ring:
: a grayish green powder obtained by reaction of alloxan with the ortho form of phenylenediamine
Resources for alloxazine
Comments on alloxazine
What made you want to look up alloxazine? Please tell us where you read or heard it (including the quote, if possible).
full of whispering sounds
Get Word of the Day daily email!
Difficult Vocab Quiz
Test your vocabulary with our 10-question quiz!
Test Your Knowledge - and learn some interesting things along the way.
Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!
Words from the week of 11/16/2018
This is just to say / Don't confuse them
What exactly is the 'it' being sufficed?
Taking a usage peeve to task
And is one way more correct than the others?
The story of an imaginary word that managed to sneak past our editors and enter the dictionary.
How to use a word that (literally) drives some people nuts.
The awkward case of 'his or her'
Another round of challenging vocab!
(Secret October WOTD Quiz)
SCRABBLE® fans, sharpen your skills!